Alfred d



(No Model) A. D. WALLEN.

SCREW DRIVER; No. 302,067. Patented July 15, 1-884.

Znveio a v wwllen, 9 dag/1.

I i. IEIERS. PmlzrLiihognphlr. Wahinglufl. DVC.

UNITED ST TE PATENT OFFICE.

ALFRED D. WALLEN, OF MENDHAM, NEW JERSEY.

SCREW-DRIVER.

SPECIFICATION fQrming part of Letters Patent No. 302,067, dated July 15,1884.

Application filed December 12, 1883. (No model.) I I .To all whom it mayconcern:

Be it known that I, ALFRED D. WALLEN,

a citizen of the United States, residing at, Mendham, in the county ofMorris and State The object of this invention -is to facilitate themanipulation and operation of ascrewtion and arrangement of the parts.

driver when driving a screw; and it consists, chiefly, in the structuralarrangement and combination of parts hereinafter set forth, and finallyembodied in thc'claims.

In the drawings, Figures 1 and 2 are eleva tions of a screw-driverembodying my im provement, the latter figure being partially in section,to show more clearly the construc- Fig. '3 is a section taken through.line a: of Fig. 2, and Fig. 4 is a detail view, similar letters ofreference indicating corresponding parts in each of the several figures.

In carrying out myinvention, the shank A of the driver is made round,and carries a sleeve, 1), in which-said driver is adapted towork freelywhen driving a screw. Said sleeve is provided with lugs a," to which arepivoted, at a, jaws c, the latter having lugs d swaged or cast thereonfor the purpose, as shown in Figs. 2 and 3. Secured to the handles ofsaid jaws are flat springs e, the free ends of which pass between thelips Z and into grooves at the base of the lugs a, as clearly shown inFig. 2, which serve toprevent any lateral movement or accidentaldisplacement of said springs, as will be manifest.' The normal tendencyof said springs is to press the ends of the jaws c, which engage withthe screw, together, thereby enabling them to grasp a screw and holdthe-same firmly in position, as will be readily understood by referenceto Figs. 1 and 2. Said jaws c are provided with I said jaws steadily intheir relative positions,

and to prevent a screw from being thrown out of line by an unequalpressure thereon by the jaws, which might result were the springs not ofequal stiffness, as will be obviousn .The lipsl are provided withapertures i, Fig. 1, to facilitate theinsertio n of the rivets whichhold the jaws 0 into connection with the sleeve b, and which also serveas th pivots on which said jaws work. The mode of operating the toolwill be readily understood by reference to the drawings without furtherdescription.

I am aware that it is not new, broadly considered, to provide ascrew-driver with a sleeve having spring-actuated clamping-jaws pivotedthereto, as such devices have been 'heretofore patented; but not to myknowledge have the springs in such cases been secured to the handleswith their free ends extending between lugs, which prevent them dles ofsaid jaws and extending between said lugs d, all arranged and operatingfor the purposes set forth.

2. The combination of the sleeve having lugs a, the jaws having lugs 61and perforated 'lips Z, engaging with each other by means of tongues andgrooves, as shown, and the springs e, secured tothe-handles of said jawsand pressing upon said sleeve, the several parts being arranged andoperating as and for the purposesset forth.

In testimony that I claim the foregoing'I have hereunto set my hand this20th day of November, 1883.

=ALFRED D. WALLEN.

Witnesses:

CHARLES H. PELL, F. F. CA PBEL

